Re: cmmflush still considered helpful?

The approach that we have been taking more recently is incremental CMM commands.  Large CMM "flush" operations were very expensive in that any pages out on paging device had to be paged in before being "flushed". Things "froze" during the flush.  Doing a few incremental CMM commands each minute

Automating z/VM, Announcing Ansible for z/VM - simple and available

For those of you interested in automating z/VM, our simple APIs have been used by customers for years.  Now we are providing the Ansible pod / playbooks for use for Ansible to interact safely and securely with z/VM.  No SMAPI, no Java, no extraneous Linux server required.   Exciting stuff!  "

Re: Suggestions on new learning

Headed to the VM Workshop?  "vmworkshop.org"... On 5/15/2022 8:33 AM, Jake Anderson wrote: Hello For the last 2 years I have been building golden image for Linux on zVM and am confident in it. Are there any new courses that I can start learning so that it will be useful for future. Any suggest

Re: Has anyone managed to install OpenShift? How many resources?

and is this an internal ibm site? On 4/27/2021 5:01 AM, blanc369 wrote: Hi, We are running a cluster of 3master nodes each 16gb 4cpu, 3 worker nodes 16gb 4cpu, 1 infra node 24gb 4cpu. In backend we have 9 IFL with smt2. The biggest system load we usually see on Infra node, where elastic searc

Re: Elasticsearch and Openshift on zVM - Suffering from CPU steal ?

If you would collect one minute CP MONITOR data, I would love to analyze it for you.  I've the best CP performance analysis tools at my disposal On 2/6/2021 3:44 AM, Mariusz Walczak wrote: Hello, I hope someone can share the experience or put some light on the problem. I will refer to el

mainframe metal to cloud in two days....

We here at Velocity  Software have a really good story that has been presented at SHARE, GSE, VM Workshop, and others.  For those of you that missed it, and especially those that think building a cloud on the mainframe or on z/VM is complicated and messy, you might want to take a look at "htt

Re: CP overhead of using FCP attached SCSI SAN

I don't see how steal time and the scsi would be related. There's an old article about what steal time is at "http://velocitysoftware.com/STEAL.html"; On 11/4/2020 10:30 AM, Dave Jones wrote: Hello, all. I have a site that is using SCSI SAN (a V7000) to hold all z/VM storagethe system z/V

Re: performance problems db2 after moving from AIX

Diag 9C are low cost, Diag 44 not so much.  50 is a low number. On 11/3/2020 12:27 PM, Grzegorz Powiedziuk wrote: On Tue, Nov 3, 2020 at 1:58 PM Grzegorz Powiedziuk wrote: Thanks Christian. There is no pagging (swapping) here besides just regular kernel's house keeping (vm.swappiness =5 ) rh

Re: AW: [EXTERN]-Re: IFL usage of Linux servers

David, you might want to look at "http://velocitysoftware.com/smt.html"; at what are the available metrics and how to use them for chargeback. Many of our Linux on z installations have a chargeback model, and SMT-2 required some updates to both the model and how to understand the metrics. On

Re: z15 on-board compression

We've done some experiments with the onboard compression on our brand new z15 and are implementing the compression in our products where it makes sense.  We have a CMS pipes stage written to make playing easy, so have CMS functionality.  As well as the assembler bits. We also included the onbo

Re: KVM only supports 4guests

Right. That’s what I’m hearing , that ‘unlimited ‘ is not available on Z Barton > On Oct 22, 2019, at 12:27 AM, Jim Elliott wrote: > > Sam: > > The Red Hat site above does not make sense to me as there is only ONE > version of RHEL available for IBM Z. That is, Red Hat Ent

KVM only supports 4guests

I’m hearing at gse that red hat on z only supports 4 guests on kvm on z? Here’s a link, am i missIng something? https://access.redhat.com/articles/rhel-kvm-limits Barton -- For LINUX-390 subscribe / signoff / archive

Re: Migration from z/VM to KVM

Velocity Software offers to universities at no charge our complete zPRO, allowing the universities to run their z/VM system without any knowledge of z/VM.  It is a complete web based interface that creates an on-prem cloud,  We will install it and support it.  Takes 1/2 day to get it all build.

Looking at IBM Secure Container?

First, I happened to see an article on LinkedIn quoting Krebs on Security.  The Capital One hack of 106 million pieces of personal information seems to have been on AWS? And an Engineer from AWS was the hacker?  The data was "improperly secured".  Why would companies put personal data somewhere

MongoDB on Linux on System Z

For those of you implementing MongoDB, or thinking about it, zVPS has added support for it: http://velocitysoftware.com/mongodb.html For those of you going to SHARE next week, you should be interested in Kurt Acker's presentation presenting his MongoDB project and management solutions utilized

Re: Idea: Using SCRT to report on Linux usage; maybe a way to reduce the entry level cost for Linux on Z?

Isn't the ibm tool just for z/os and at the LPAR level? nothing to do with what goes on inside z/vm. nothing to do with what goes on inside linux for specific licensing. I've been asked to provide such information by another vendor, and that function will be released shortly. This allows the 4

Re: Guest show steal and the LPAR has available CPU

ICF 3 3 00.500 0.5 ZIIP 1 0 18.5 7.9 0.1 0.5 On 2/1/2018 11:58 AM, Victor Echavarry wrote: Barton: This is the report of the CPU at the moment of the steal, VML2 is production and VML4 is test. ESALPAR - Logical Partition Analysis

Re: Guest show steal and the LPAR has available CPU

It's very important to look at it first from the total IFL perspective. What is the total IFL utilization? Then break that down by LPAR. If 100% of your IFLs are in use, and one LPAR is using 60% of the IFL resource and the other LPAR is using 40% of the IFL resource, then it's a matter of priori

Re: How many Intel cores does an IFL emulate

Yes. Gigahertz is gigahertz. If you can measure ghz consumed on x, you can guestimate requirements on z. The only way to understand requirements is to know current use. Barton > On Nov 7, 2017, at 8:28 PM, Victor Echavarry Diaz > wrote: > > We receive a request from a

Re: Diagnose high wait

On our website, "http://velocitysoftware.com/present/flowchrt.html"; , there is a performance analysis flow chart. When there is wait, it is MOST often not related to the linux server, it is MOST likely to be related to resource constraints that the server just happens to be using (cpu, storage/r

Re: Top User show high cpu steal

He needs to know how to upload Barton > On Jan 22, 2017, at 2:10 AM, Tim Kessler wrote: > > Victor, > Upload an hour of data from zwrite 191 from when the problem occurred > > -Original Message- > From: Victor Echavarry Diaz > To: LINUX-390@VM.MARIST.EDU &g

Re: CPU Steal on Linux Guest

linux server. On 12/20/2016 9:34 AM, Victor Echavarry Diaz wrote: Barton: The other LPAR has 3 active IFL's. The fourth is offline. Regards, Victor Echavarry System Programmer Operating Systems -Original Message- From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Beha

Re: CPU Steal on Linux Guest

How much of your IFLs are in use by the other LPAR(s)? On 12/19/2016 2:19 PM, Victor Echavarry Diaz wrote: Can someone explain why CPU steal is? We believe that when the VM LPAR is using almost all is IFL's CPU stealing begins between guests. But today this specific LPAR has 4 IFL and is usin

Re: Additional SWAP recommendations

Yah, I've yet to see any data justifying wasting disk (except to get a lunch from your disk vendor) for swap space instead of just moving the extra disks to be part of the paging subsystem. If anybody has any data that they think justifies this position, please send it. VDISK gets paged out to di

Re: Open stack on RHEL

For those interested. We have a project to replace xcat/smapi with a full backend for openstack on z/vm as part of our zpro offering. The objective is for a user of openstack to have control over a z/vm service the same as their vmware service. Since our API already includes any or none of VMSecu

Re: How to monitor CPUPOOL utilization

You are probably looking for the ESAPOOL report, been there a while in zVPS. Report: ESAPOOL CPU Pool Report Veloc Monitor initialized: 10/02/14 at 08:47:03 on 2828 serial 514C7 First D

Re: cp3kvmxt / monwrite and storage info

No, monitor data does NOT contain storage information from other LPARs. The CPU information comes from the HMC and is only available to show CPU consumption by the LPAR - nothing within. On 1/5/2016 6:28 AM, Grzegorz Powiedziuk wrote: Hello, I am trying to capture performance data with cp3kv

Re: New Subscriber's first question.

I believe CMMA was withdrawn, and function completely removed in SLES 11. On 12/18/2015 10:12 AM, Davis, Jim [PRI-1PP] wrote: I am a systems programmer at Primerica Life Insurance. We have been running SLES linux under VM for nine years. We only have four production VMs on one lpar using a singl

Re: Status of VDISK after swap space usage

It couldn't be pgmbk, this was a result of a LINUX CMM command, and it was the Linux storage assigned to the virtual machine that was targeted. On 12/11/2015 11:01 AM, Bill Holder wrote: Barton Robinson wrote: Drop another 20,000 pages, and there are 40,000 page reads (and 20,000 page w

Re: Status of VDISK after swap space usage

experiment). End result was 40,000 less pages on disk space and a LOT of page reads. Too bad no one from Endicott sees my presentations. On 12/11/2015 4:33 AM, Bill Holder wrote: On Thu, 10 Dec 2015 14:05:26 -0800, Barton Robinson wrote: If anybody in endicott is listening, ONE REQUEST. The

Re: Status of VDISK after swap space usage

Alan Altmark wrote: On Wednesday, 12/09/2015 at 08:15 GMT, Barton Robinson wrote: My request to get this fixed was rejected by ibm several years ago. The problem is that even though linux doesn't have anything on the vdisk, z/vm still has to back it. I asked for a diagnose as we do with re

Re: Status of VDISK after swap space usage

My request to get this fixed was rejected by ibm several years ago. The problem is that even though linux doesn't have anything on the vdisk, z/vm still has to back it. I asked for a diagnose as we do with real storage - a way for Linux to tell z/vm the page no longer needs backing. So after the

Re: Help with cpu stealing

accomplished at the time. But we had a rather standard Java workload across the board, and perhaps more a more complex workloads and larger numbers of guests changes things. That said, I acknowledge your expertise, and value to this forum Barton! -Original Message- From: Linux on 390

Re: Help with cpu stealing

The best way is to first understand your share settings and avoid excess share.See Rob's paper on the topic here "http://www.velocitysoftware.com/relshare.HTML"; Use zalert to detect problems, and have zoperator to give your operations and applications people early indication. i believe you ar

Re: Help with cpu stealing

No, please don't do this. Having weights in the 1000's is what causes this problem, creates excess share, the looping user takes over. If you don't understand excess share, keep shares in the 100's, and use absolute shares where you know exactly what is intended. On 10/28/2015 7:13 AM, Veencamp

Re: DIRM problem

This is the reason I have re-invested in a full rewrite of ZPRO to completely eliminate any need for SMAPI. Our community objectives should be to make our systems easier to implement and maintain. Companies are not investing in the training as in the past, skills are harder to acquire, and invest

Re: zLinux CPU monitoring

There is a GSE conference for Linux, z/VM and z/VSE in Stuttgart Germany in 3 weeks. That same week, there is a performance class that will show how to get exactly what you want using zVPS "http://velocitysoftware.com/zvps.html";. If you care about performance of Linux under z/VM, you need the z

linuxvm.org, velocity back online

bc12 moved successfully and is back up. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX

websites down - Linuxvm.org, velocitysoftware

Due to system upgrade, Velocity Software and other hosted sites will be down today. Note these websites all run under z/VM on a BC12, secured by RACF. Our growth, current projects, and many projected future projects require a move to a larger space. We are looking at a large number of interest

websites down for bc12 hardware maintenance

Hardware maintenance means the Velocity Software and LinuxVM.ORG websites are temporarily down, as are a few of the local user groups that we host. back up shortly -- For LINUX-390 subscribe / signoff / archive access instructio

Re: How to find a memory leak?

4.8 13.7 5500 0.8 115.60 00 38.30 251 0.0 On 7/9/2015 9:31 AM, Michael MacIsaac wrote: Barton, It reports on the /proc/buddyinfo values and anticipates vmcp failing? On Thu, Jul 9, 2015 at 12:26 PM, Barton Robinson < bar...@velocitysoftware.com> wrote: And

Re: How to find a memory leak?

And a good performance monitor would already have this reported - down to the process level. On 7/9/2015 9:06 AM, Michael MacIsaac wrote: Let me answer my own question. Perhaps kludgy, but by adding 'tee' to sudo, this technique works: root@lab141:~ # visudo root@lab141:~ # tail -1 /etc/sudoer

Re: Where can I locate Apache Web server for zLinux?

or you could do it from z/vm with ZVWS. It is very fast, and trivial to use. On 3/19/2015 8:40 AM, Vitale, Joseph wrote: Hello, I need to install a simple Web Server to server up 1 file. Internal load balancing requirement. Looked at Apache Web site, found binaries for Windows and Linux

Re: Retiring

Will miss you Annie, I've another 15 years to go Barton > On Feb 26, 2015, at 3:55 PM, "Smith, Ann (CTO Service Delivery)" > wrote: > > Tomorrow is my last day at IBM > Hit the big 60 and I am retiring > 8 years working in MVS, 22 in VM and 8 with Linux >

Re: Anyone has experience on selling zLinux at fixed price?

I've looked at the amazon and google chargeback models. One of their options is a fixed price until some number of CPU hours is exceeded. This allows the 'easy' fixed fee, but also controls the resource abuser. You would have to have tools in place to alert the abuser that they have gone bey

Re: Iaas - SCO vs IBM Wave vs xCat vs zPro - ZPRO

zPRO has been out for about 4 years and was a project started almost 10 years ago. We had many customers create their own self service applications using our web technology, it seemed reasonable to take their ideas and make a common product. ZPRO V2 is built on ALL native z/VM functionality, mea

Re: SLES11 SP3 v SP1

AMEN On 11/19/2014 9:38 AM, Mark Post wrote: On 11/19/2014 at 03:18 AM, "Guest, Darren" wrote: Mark, are you suggesting that the Oracle team should have some actual data to back up their claims? Not just a bloke with a stopwatch and an uneasy feeling?! ;-) But yes, I have already asked them t

Re: Automated performance reporting on Linux on Z

em started, and what caused it? Or do you just reboot? On 11/9/2014 1:38 PM, Tito Garrido wrote: If you are going to try SAR take a look on KSAR project... http://sourceforge.net/projects/ksar/ Regards, Tito On Sun, Nov 9, 2014 at 1:30 PM, Barton Robinson wrote: I just had an installation d

Re: Automated performance reporting on Linux on Z

I just had an installation demonstrate the perfect tool for you. In looking at what alerts should be set for operations, one of their many zlinux servers had a swap full condition. They were able to go back thru reports from last 12 months, took less than a minute to identify when the swap fi

Re: Performance Toolkit and zLinux

The RMFPMS was a brilliant but misguided piece of software that the author stopped supporting about 10 years ago. If it costs several IFLs to run "free" software, there's a lot of misguidance going around The best thing about some of these tools is that your management can't tell what their r

Re: Performance Toolkit and zLinux

Our software (zVPS) is not free, but is no charge for POC. Our mission is to help you succeed with the Linux on "z" POC. On 8/25/2014 7:46 PM, Martin, Terry Contractor wrote: I am in the same boat. I would like to use Velocity for my client but since is a POC they want to sick with something

z/VM and Linux Performance Workshop - cross posted

Dear all, we are offering our famous performance class for the VM-Workshop attendees, on 24 & 25 June, in North Carolina. For registration and more details please visit: http://velocitysoftware.com/seminar/workshop.html Please reach out with any questions. Best wishes and see you in North Caroli

Re: zLinux replacement for PROP

zOPERATOR, a no charge feature of zVPS (from Velocity Software) can accept and record and respond to messages. On 3/13/2014 9:13 PM, Morris, Kevin J. (RET-DAY) wrote: I would like to "send" all operator messages to a zLinux guest for further processing/storage, essentially replacing PROP. Is

VM SET REORDER OFF for large hosts

edback on VM SET REORDER OFF for large hosts... Jon -Original Message- From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Barton Robinson Sent: Wednesday, January 15, 2014 2:23 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: Swap behavior change between SLES 11SP2 and 11SP3? Wit

Re: Swap behavior change between SLES 11SP2 and 11SP3?

With all of the installations (100s) i've worked with using vdisk for swap, this would be the first complaint i've heard with the exception of some bad configuration defaults. If you had really good performance management tools, I'd be happy to look at the data. On 1/15/2014 5:44 AM, Veencamp,

Re: High cpu utilization on vm/linux LPAR

also has known issues. IBM has a workaround you can GOOGLE. -Original Message- From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Barton Robinson Sent: Friday, January 10, 2014 12:19 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: High cpu utilization on vm/linux LPAR Thi

Re: High cpu utilization on vm/linux LPAR

This could be just new year workload. Or someone is running some new scripts that are consuming LARGE amounts of CPU. The data shows nothing strange in the CPU distribution between servers: Report: ESAUSP2 <---CPU time--> UserID <(Percent)> T:V /Class Total Virt Rat -

web site outage (LINUXVM.ORG, VelocitySoftware.COM)

Due to hardware upgrade, several websites that we host on our z/VM systems will be down on thursday. This includes: LINUXVM.ORG LINUXVM.COM VelocitySoftware.com DEMO.VelocitySoftware.com If everything goes write, the new "Velocity Cloud" will be much bigger than ever on Friday. Our VERY old P39

Re: VM Monitor

all good. On 10/3/2013 2:42 PM, Gregg Levine wrote: Hello! Thank you Barton. Now did I properly describe the situation? The important phrase was indeed "licensing" in your statement. I chose simply "acting as a vendor". I didn't want to go into too much detail. -

Re: VM Monitor

Mauro, please Read That Fine Manual/article again, "licensing" does NOT equal acquisition. product news CA Technologies Signs Global Licensing and Distribution Agreement with Velocity Software, a Leading Linux Performance Management Company

Re: VM Monitor

Guys, you DO know I read this stuff? Anybody that knows me, had a beer with me, or much about my business would never imagine me working for someone else. I work hard at being a technology leader - that means investing in things the bean counters can't even imagine having value, investing in a la

Re: Oracle RMAN OOM

Really good performance monitors would give you lots of good information. On 10/2/2013 4:28 AM, van Sleeuwen, Berry wrote: If anything I even would like to decrease the memory configuration rather than increase it. Unfortunately I got overruled by the Oracle guys who still think more memory me

Re: Dedicated IFL shows 100% busy running essentially nothing

dedicated IFL's or GPs always look 100% busy from the LPAR perspective, and that is the data fed into RMF or CP Monitor On 8/20/2013 9:01 AM, Richards, Robert B. wrote: My VM/Linux guy came to me with a several disparate displays (a HMC Activity Display, a TMONMVS LPAR Summary screen and s RMFI

Re: CPUPLUGD or VMRM-CMM or CMMA

CMMA is gone, didn't work right and support was pulled. VMRM does not have proper feedback and is more likely to crash your linux server than help CPUPLUGD - never seen any measured value. Focus on understanding the storage requirements. One of the presentations at the VMWorkshop last week was "Un

cloud on z/vm

I've seen several installations over the last few years build their own web based applications for cloning. That was my incentive for producing a low cost web based application that included cloning ("http://VelocitySoftware.com/zpro.html";) and to provide some level of standardization. How many

Re: MIPS increase after SLES11 SP1 patches

If you investigate the ESALNXP report provided by ZVPS, you will see a cron job with your latest "patches", and not before that. One just needs good tools Srivastava, Sagar wrote: We implemented latest patches on our SLES11 SP1 systems recently Now all the zLINUX guest are using almo

Re: Central vs. Expanded Storage - current recommendation

please make 20% of your storage ExStore. This only matters if you are storage constrained, so benchmarking differences when there are no constraints will not show a difference. When you become storage constrained, the 20% ExStore will easily show better performance. Richards, Robert B. wrote:

Re: New book: Linux Health Checker 1.0 User's Guide

It's called zTUNE. "http://velocitysoftware.com/zztune.html"; Michel Beaulieu wrote: Hello Linux-390, I know this is the LINUX-390 list, However, let me ask: Do we have any equivalent "System Health Checker" for z/VM? Michel Beaulieu IBM SO-Delivery (Canada)

Re: Does anyone use Microsoft's SCOM monitoring tool with zLinux?

And ZVPS from Velocity Software supports microsoft as well as linux on x86 for operations as well as full performance management. David Boyes wrote: Looking at the Microsoft websites (not very helpful of course, more marketing, little technical) for SCOM (System Center Operations Manager 2007 R2

Re: Question about zVM and MF configuration

one lpar works well, shares storage, shares other resources, reduces overhead, reduces system programming efforts, reduces costs. And I can show other mixed mode LPARs with both VSE and linux in the same LPAR. Was it a hardware vendor recommending increasing your hardware costs Michael Sim

Re: z/VM Switch performance

Re performance, there has been no need to change time slice since qdio, about 5 years ago. Offer Baruch wrote: Hi all, Well we conducted another test (much better than the last one - it had too many unpredictable variables): 1. 1 destination machine let's call it "dest1" 2. dest1 has 2 nics

Re: WebSphere Application Server - Idle Server Tuning

Before I get REALLY excited, has anyone tried this and validated they can get Linux servers running WAS to drop from QUEUE (as in drop from QUEUE 3)? Jim Elliott wrote: I don't believe this has been posted here before, but IBM has published a TechDoc on this subject. http://ibm.com/support/tech

Re: Communication Controller for Linux, monitoring

Are you looking at monitoring network traffic? uptime? availability? resource consumption? ZVPS ( "http://velocitysoftware.com/zvps.html"; ) does all that and more. Kowalski, Steve S wrote: Hello, Is anyone using any monitoring tool (except the MOSS Console) for Communication Controller for Li

Re: Set Share Relative

I really despise the "system defaults" of REL 1500, or REL 5000. They seem (were) provided by someone ignorant of how the scheduler actually works. Rob has a nice paper showing the damage. Though ibm might try and code around how this damage impacts your system, changing these defaults to realis

Re: MONDCSS after IPL

it's really hard to make the mondcss go away unless there was a purge done, and when the application went away, so did the dcss Dean, David (I/S) wrote: How do you make MONDCSS permanent? We IPL'd, the segment did not come back, and monitoring is not working. I know how to set it up manua

CICS to Linux, I like it...

Just in from IBM systems magazine. CICS on z/os workloads moving to Linux on z. wow. Organizations are consolidating workloads onto Linux on IBM System z to lower costs, standardize operations and enhance IT flexibility. Now you can move online and batch mainframe applications to scalable Inte

Re: Moving Oracle off zLinux boxes -- comments from the field?

7;s commitment of support there as well). From: Barton Robinson To: LINUX-390@vm.marist.edu Date: 03/18/2011 04:04 PM Subject:Re: Moving Oracle off zLinux boxes -- comments from the field? Sent by:Linux on 390 Port wow, your DBAs have the authority to spend that

Re: Moving Oracle off zLinux boxes -- comments from the field?

wow, your DBAs have the authority to spend that kind of money and make that kind of change without management signature? So no financial analysis, no technical reason, sounds religious. CHAPLIN, JAMES (CTR) wrote: We just had a surprise announcement by one of the Oracle DBAs during a zLinux & Ap

Re: Gotcha's

Well, since you are ready. First, Oracle is VERY virtual friendly. And has been the most virtual friendly application there is. BUT, if you use RAC, it seems that someone decided to compete in the "virtual hostile" arena by making it poll at a high enough rate to ensure you need to buy a LOT

Performance Education scheduled

For those of you interested in performance, or performance management of your Linux and z/VM environment, our Performance Education schedule is now posted for 1st half, at "http://velocitysoftware.com/seminar/index.html";. Offerings are the 4 day workshop and 1 day seminars.

Re: Guest configuration question

Rules of thumb change, or get old. The linux spin locking has greatly improved. new evidence is showing that letting z/vm do the scheduling is more efficient for later releases of Linux - as long as there are no spin locks occurring. For example, in a one-ifl configuration, having WAS servers ru

Re: Guest configuration question

The consideration is the LPAR overhead. The more dispatching there is, the more is the "physical overhead". I've seen that running as high as 5% of each processor on overcommitted systems, and .1% normally. Joe Martin wrote: Have a development system that has 2 IFLs and both are configured to th

Re: Virtual cpu question

So I have a customer who I hold in high regard that did similar studies. She defined a 16-way linux server in something like 4 IFLs. (I thought she was crazier than normal). But results were "very good". The only thing I can think of is that the scheduler in linux is so bad, that letting the z/vm

Re: FW: SAS on zLinux

Isn't there another vendor that has announced a "sas replacement" that runs on zlinux? Fairclough, Peter wrote: Aaron - I would definitely be interested in SAS in zLinux. Pete Fairclough 212-556-4248 -Original Message- From: DeFabritus, Peter Sent: Thursday, September 23, 2010 11:22 AM

Re: winbind slowdown

SET on your z/vm system "SET SRM STORBUF 300 300 200" Moeur Tim C wrote: Hello All, I've been implementing IBM's MQ series on zLinux machines to replace our current architecture of MQ on Windows. To do so, however, I have to reach back to our Active Directory server for group enumeration to fi

Re: Virtualization with the Best TCO?

Isn't the real problem that the VMWare vendor(s) does a LOT of advertising and marketing, and the z/VM vendor does not (other than preaching to the choir)? Graves, Aaron wrote: The implication is that these represent the leading edge of virtualization, completely ignoring z/VM's capabilities.

Re: mono keep guest active - ban the blips.

Yep, this is exactly the problem. These processes do not use "much" cpu, but they "blip" every 10ms or so. You need to check the queue from the z/VM side to see if they are in Q3. If in Q3, then they are blipping (think i need to trademark that word). The reason these "blips" are so virtual un

Re: mono keep guest active

Yes, this is a problem. We call it "virtual hostile". Rob van der Heij has been doing a tremendous amount of research in this area for the last 4 years, we've been trying to educate our customers (and IBM) on what this means. Back in 2001, there was the Linux timer, had the same problem. Got th

Re: DB2 direct i/o question

But, Oracle is VERY virtual friendly, and DB2 is VERY virtual HOSTILE. From a system performance perspective, I REALLY LIKE Oracle. Mark Post wrote: On 7/30/2010 at 12:03 PM, Marcy Cortes wrote: Does this make Oracle a better fit on Linux on z than DB2? That depends on how much you care abou

Re: IBM zEnterprise System announced???

announced) Alan Altmark wrote: On Thursday, 07/22/2010 at 11:34 EDT, Barton Robinson wrote: So the biggest announcement of the year, i'm on my second pot of coffee, and there's still only one post about this? Is this a non-event? Kind of hard to talk about the enhancements in

Re: IBM zEnterprise System announced???

ge- From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of Barton Robinson Sent: Thursday, July 22, 2010 8:33 AM To: LINUX-390@vm.marist.edu Subject: Re: [LINUX-390] IBM zEnterprise System announced??? So the biggest announcement of the year, i'm on my second pot of coff

Re: IBM zEnterprise System announced???

So the biggest announcement of the year, i'm on my second pot of coffee, and there's still only one post about this? Is this a non-event? Dave Jones wrote: And what's old is new againthere's a water cooled version of the z196. :-) DJ On 07/22/2010 06:38 AM, Jim Elliott wrote: The IBM zEnt

Re: How find what resource is needed

You really need a decent performance monitor. I can already see that your settings would not be my view of "best practices" Rogério Soares wrote: Listeners, I have a strange problem again... on my lpar for development, i have now queue E3, each time a run #cp q exp i have a different machi

Re: UK zLUG

0 at 05:22 AM, Shane G wrote: Now there's a lad that gets around. He was speaking here in Aus just a couple of weeks back. Yes, I think Barton logs more air miles than most migratory birds. Mark Post -- For LINU

Re: open source performance monitor -uses z/VM *Monitor System Service

So, monitoring "mainframe software" is really about "MANAGING", this is not the "pc world". Does your objectives have anything to do with the following disciplines: 1) Performance analysis including all subsystems (DASD, Storage, PAging, CPU, Network) 2) Capacity Planning (same subsystems), wit

Re: Unable to kill process

Any chance VMRM was active and too storage away? Mark Perry wrote: Hi Ron, thats a support question if ever I heard one. Contact SAP/IBM. (Which of course will lead to a question on maintenace levels of linux and sap.) If kill -9 doesn't work then the process is in a system routine that can be

Re: ESALPS Alerts - Production Models??

There are many samples on the customer area of our website in: "http://velocitysoftware.com/customer/tips/index.html"; beyond what is shipped with the product. Rodery, Floyd A Mr CIV US DISA CDB12 wrote: I was curious if anyone is sending alerts to their enterprise monitor using Velocity's ESALP

Re: Poor WebLogic Performance

or Weblogic. I've not seen or heard of any performance studies done for weblogic. Carson, Brad wrote: Barton, Well, we are using the z/VM performance Toolkit and BMC Mainview for our monitoring on this lpar. This is how we were able to get down to the which guest is behaving bad and the

Re: Poor WebLogic Performance

IF you have a good performance monitor, you would know exactly what process on what server is using CPU. With zVPS (ESALPS), on one screen, you can see ALL the top processes across your entire Linux farm, with one PFK, you can sort them by cpu. Knowing where your cpu is going means you can do capa

Re: A Question on Sizing z/VM Linux Guests

First rule of thumb, don't guess. Since Oracle SGA can be anywhere from a few hundred megabytes to 10's of gigabytes, you need to size the server larger than the SGA. If you undersize the server, you WILL have undesirable performance. On intel they size based on low cost of storage and I/O avoid

  1   2   3   4   >